DBPapers
DOI: 10.5593/sgem2012/s02.v2019

IMPLEMENTATION OF TDR TECHNOLOGY FOR MONITORING OF NEGATIVE FACTORS OF SLOPE DEFORMATIONS

M. DRUSA, V. CHEBEN
Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 2, 143 - 150 pp

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 2, 143 - 150 pp

ABSTRACT

Time domain reflectometry (TDR) has been used for a first time in 1950’s to examine
electrical properties of cables and transmission lines, and measuring the electrical
properties of organic liquids. Universality and further enhancement of the technology
during the 1980’s led to monitoring of slope and landslide movements. Thus, TDR has
been utilized in monitoring slope movement to locate shear planes in localized shear
failures. The main advantage of TDR monitoring is localization depth and type of rising
deformations bellow surface. However, advance in electrical technology last 20 years
led to emerging air dielectric cables that became object of interest for further
development in geotechnical engineering. Thanks to its material, mechanical and
electrical properties were chosen for application in water level measurement as the most
acting negative factor on slope stability. Today new way of installation of coaxial or
piezometric cable by dynamic penetration (DP) and static penetration (CPT) machines
is in progress of research Drusa et al. (2011) and also experiences comes from other
research works, where TDR was implemented in certain European conditions of
landslides - Corsini et al. (2008), Singer et al., (2010).

Keywords: TDR monitoring, TDR piezometer, inclinometer, slope movement,
landslide monitoring.